Find SV. It’s hard for me :(
1 answer:
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Answer:
Yearly sales in 1990: $98,800.
Step-by-step explanation:
We have been given that the sales of a certain appliance dealer can be approximated by a straight line. Sales were $6000 in 1982 and $ 64,000 in 1987.
If at 1982, then at 1987 x will be 5.
Now, we have two points (0,6000) and (5,64000).
Now, we will represent this information in slope-intercept form of equation.
, where,
m = Slope,
b = Initial value or y-intercept.
We have been given that at , the value of y is 6,000, so it will be y-intercept.
Substitute values:
Therefore, the equation represents yearly sales.
Now, we will find difference between 1990 and 1982.
To find yearly sales in 1990, we will substitute in the equation.
Therefore, the yearly sales in 1990 would be $98,800.
Note: The height of the room must be 3 m instead of 3 cm because 3 cm is too small and it cannot be the height of a room.
Given:
Perimeter of the floor of a room = 18 metre
Height of the room = 3 metre
To find:
The area of 4 walls of the room.
Solution:
We know that, the area of 4 walls of the room is the curved surface area of the cuboid room.
The curved surface area of the cuboid is
Where, h is height, l is length and b is breadth.
Perimeter of the rectangular base is 2(l+b). So,
Putting the given values, we get
Therefore, the area of 4 walls of the room is 54 sq. metres.